Flue pipe section with check draft



March 13, 1951 JONES FLUE PIPE SECTION WITH CHECK DRAFT DAMPER Filed April 10, 1947 Patented Mar. 13, 1951 UNITED snmzs PATENT OFFICE FLUE PIPE SECTION WITH CHECK DRAFT DAMPER Llewellyn Jones, Bloomington, 111.

Application April 10, 1947, Serial No. 740,524

7 My present invention has for its object to provide as an article of manufacture a combined pipe section and check draft for use as a component element in furnace smoke pipes or stoves, the parts of which are so arranged as to eliminate much of the labor and annoyance in making the initial connections between a furnace and a chimney and which will facilitate the replacement of the check draft when repairs to the pipe connections are required.

Another object of my invention is to provide a pipe section made in sheet form to be subsequently rolled into a tubular shape and provided with a vent opening having provision for the hinging of a damper door thereon with reference to the ultimate placement of the section in either a horizontal or vertical position.

To these and other ends my invention has forv its object to provide further improvements in construction, all as will be fully described in the accompanying specification, the novel features thereof being set forth in the appended claims.

In the drawings:

Figure 1 is a view showing a furnace having the usual horizontal smoke pipe and illustrating my invention in connection therewith.

Figure 2 is an enlarged end view of my improved pipe section also showing a central transverse portion in cross section.

Figure 3 is a plan view of the sheet from which the pipe or damper section is formed.

Figure 4 is a view similar to Fig. 1, somewhat enlarged showing the pipe section disposed vertically.

Figure 5 is an elevational view of the door or damper, and

Figure 6 is a side view thereof.

Similar reference characters in the several figures indicates similar parts.

As an aid to an understanding of the present invention I have shown in Fig. 1, for illustrative purposes, a conventional heating apparatus comprising a hot air furnace having the fire box I and the circulating chamber 2 from which the products of combustion pass outwardly through a flue 3. The latter is connected to a chimney by a smoke pipe composed of the sections 4 and 5, as will be understood. In this figure the pipe is shown as extending generally in a horizontal direction, however in practice it is preferably arranged at a slight angle sloping upwardly toward the point at which it enters the chimney. In some instances the smoke pipe may extend upwardly in a vertical or nearly vertical position. Mention is made of hese chara t rist c positions 4 Claims. (Cl. 126-293) of smoke pipesasvthey are more or less standard forms of heating equipment installations and I have provided means in a single structure for meeting both conditions.

Instead of making my check damper section of pipe tubular in the first instance I construct it in sheet form and so retain it until it is required for use, thus saving valuable storage and shipping space. The sheet 6 is shown in Fig. 3 as rectangular and capable of being rolled into a tube, as shown in Fig. 2, of any. required diameter capable of fitting around the ends of contiguous portions 4 and 5 of the smoke pipe.

For .the purpose of retaining it as a cylinder and eifecting a tight connection I use it as a draw band and provide at its free end a pair of outstanding ears l1. On its other end are similar alined ears 8-.-8 spaced from this extremity of the sheet sufliciently to leave a portion 9 which when the sheet is rolled extends within the free end sufficiently to insure complete closure of the cylinder. The ears I and 8 are perforated to receive draw bolts II] which serve to clamp the damper sect on or draw band securely in its adjusted position.

. Near the free end of the flat sheet I form an aperture for the damper opening or air vent l5. This is preferably circular in outline and within its periphery are four equally spaced inwardly extending. fingers a, b, c, d, two of which lie in a plane parallel with the free edge of the sheet 6,

the others being in a plane at right angles thereto.

Adjacent one of the pairs of first mentioned fingers there are also formed two additional ears e and 3. One of the fingers of each pair of fingers is intended .to be bent outwardly to form one member of the damper door hinge at which time the other fingers or projections are bent inwardly, as shown in'Fig. "2, toac't' as "stops for positioning the ends of the draw band by engaging the ends of the pipe sections 45 inserted therein.

In Fig. 5 is shown the closure for the aperture l5 which serves as a door and is customarily referred to as the damper. It is formed as a disc l6 and may be of the same gauge metal as the sheet 6 and of a diameter exceeding that of the aperture l5 and is curved transversely, as shown in Fig. 6, to fit snugly against the -outer face of the damper section. At its upper side the disc is slotted near its edge, as indicated by I1 and the material beyond the slot is curled outwardly to provide a bead 18 the forming of which gives a short straight edge I9 parallel to the slot l1.

The hinge connection for the damper door is completed by bending outwardly the tab or car a in relation to the aperture 15, passing the slot ll of the disc thereover and further curling its extremity around the bead I8. The foregoing description of the hinge connection applies to a damper section extending horizontally, but the same is applicable when the section is located vertically with the exception that then the tab 0 is uppermost and it is the one that is used to provide the door hinge.

When the damper section extends horizontally either of the tabs at and b may be used as the hinge member depending upon which one uppermost, thus relieving a workman from paying attention to which may be the right, or left hand ends of the section and the same applies to the tabs 0 and d. However, there is another reason for providing the two last mentioned tabs. For instance when either tab a or b is used as a hinge tabs 0 and d are to be bent inwardly thus forming inwardly extending projections which serve as stops against which the extremities of adjacent pipe sections may engage when the damper band section is applied between them.

It is for this reason that .the two spare tabs e and fare placed adjacent the tabs 0 and at so that when the damper section is disposed vertically and .c or d (whichever one is uppermost) is turned outwardly .to ,form a hinge either 2 or f maybe used as the stop .for that joint of the smoke pipe, the end of which lies adjacent the hinge tab.

In Figs. 1 and 2 I have shown the usual damper regulatingchain 20 which extends upwardly to an upper room of a dwelling. .At its lower end it carries a ring 2! and is connected to the damper by a short outwardly extending arm 22. This arm has a threaded inner end projecting through an aperture in the damper .door and. is

secured thereto by set nuts 23 which engage a opposite faces of the disc l6.

In the arrangement of parts above set forth I have obviated the useof cast metal parts and provided a structure that is capable of being manufactured at low cost and moreover is one that may be quickly applied either in new or initial installations or as a repair part.

I claim:

1. Acom'bined pipe section and damper comprising a rectangular metal sheet. capable of being rolled into tubular form provided with an aperture forming an air vent, fastening devices on opposite ends of the sheet for securing it in tubular form after it has been so shaped, a door having top and bottom edges hinged at its top edge tothe sheet and covering the aperture, and said sheet having a plurality of pairs of oppositely disposed tabs positioned around said aperture and extending into the aperture, said pairs being positioned in planes at approximately right angles to one another, adapted to be bent inwardly for providing positioning stops for either vertical or horizontal joints of pipe to which the pipe section may be attached.

2. A combined pipe section and damper comprising a rectangular metal sheet capable of being rolled into tubular form provided with an aperture forming an air vent, a tab on the sheet extending into the aperture adapted to be bent outwardly when the tube is formed, and a door for covering the aperture having a slot at one edge adapted to receive said tab and form a.

hinge therewith.

3. A combined pipe section and damper comprisinga-rectangu'lar metal sheet capable of being rolled into tubular form provided with an aperture forming an air vent, a plurality of tabs disposed in pairs on the sheet and located on opposite sides of the aperture and extending into the aperture, a door covering the aperture having a slot near its edge adapted to receive one of the tabs. in one pair when the same is turned outwardly and forming therewith a hinge, the remaining pair of tabs being capable of being bent inward and in this position forming stops at opposite sides of the aperture.

4. A combined pipe section and damper comprising a rectangular metal sheet capable of being rolled into tubular form provided at one end with an aperture forming an air vent for the side of the tube, tabs on the sheet extending into said aperture, two being adapted to lie substantially parallel to the axis of said tube and two lying at right angles thereto, a door covering the aperture having a slot near one edge adapted to receive any one of said tabs when the same is bent outwardly on the sheet to form a hinge connection therewith, the remaining tabs lying substantially parallel to said axis being adapted to be bent inwardly and serving as stops for pcsitioning the ends of the pipe section with respect to the ends of joints of pipe to which it "may be attached.

LLEWELLYN JONES.

REFERENCES one!) The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 183,494 Draper Oct. 24, 1876 557,768 Coleman n Apr. 7, 1896 739,600 Heinig Sept. 22, 1903 Y 1,437,937 Gray Dec. 5, 1922 

